#include <bits/stdc++.h>

#define MAX 500000



int main()
{
    int count;

    scanf("%d", &count);

    int connectedLinks[MAX];
    memset(connectedLinks, 0, sizeof(connectedLinks));
    int a,b;

    for(int i = 1; i < count; i++)
    {
        scanf("%d%d", &a, &b);

        connectedLinks[a]++;
        connectedLinks[b]++;
    }

    int result = 0;
    for(int i = 0; i < count; i++)
    {
        if(connectedLinks[i] > 2)
            result += connectedLinks[i] - 2;
    }

    printf("%d", result);


    return 0;
}